I kinda hope that they don't consider removing Optimus and Megatron, to give us Rodimus vs Galvatron... as half the fandom won't like it, and most of the general public won't get it... it will just kill off the franchise.

It might seem a bit repetitious having Optimus always in it, and Megatron coming back all the time, but those are two-thirds of the character elements that the majority of those millions of regular movie-goers are there to see.

As bad as the writing is, and the low impression many of us have of the live action movies, the revenue they rake in is what gives Hasbro the money to give us collector-focussed toys like Generations. Just look at what it was like before 2007, with a cartoon toyline and the occasional small range sub-line on the side. Now with the Movie toylines we have a cartoon toyline, an ongoing sub-line (Generations), an ongoing kids line (Rescue Bots), and the occasional small range sub-line (Hero Mashers, Kreo, Construct-Bots, Battle Masters, Bot Shots).
So no more Movies means less toys aimed at us collectors, or none at all (just look at the GIJoe fandom).